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I could use some help with my calculations.

post #1 of 6
Thread Starter 
OK, first off I'd like to say hello to everyone. I have floated around the site for a while and finally decided to join the community. I managed to pick up a 200lb propane tank that someone started to build so far it had the door cut and hinges welded. I used feldon calculator the firebox I made so far is 19"x19"x19" Based on a 24" diameter x 33" long tank. I tried using the circle calc to get the fb/cc opening I'm getting a segment height of 3.5, a 4.5 under RF plare and a chord ab of 29.874 does this seem correct? Here is the link to the feldon calculator numbers. http://www.feldoncentral.com/bbqcalculator.html
post #2 of 6
Based on a 24" diameter x 33" long tank.

That come out to a 65 gallon tank.... take a picture of it... and maybe re measure the tank..
post #3 of 6
Thread Starter 
I re measured before I went to work diameter is 24" longest point inside the tank is 33" right in the middle


post #4 of 6
15000 x 0.017 = 255 c,i, stack volume = 3" x 36" above the CC or 4" x 21" stack
15000 x 0.001 = 150 Sq In FB air inlets ... I recommend an air inlet directly across from the FB/CC opening of 4-6 sq. in.
15000 x 0.004 = 60 Sq In. FB/CC opening
and area under the RF plate
That translates to a 5" high cut out (ED) on a 12" radius....
And the RF plate (Chord AB) 19.5" wide

The calculator I used is one I adjusted using Feldon's original calculator to account for the problem when making a RF smoker...

Here are the details... and the circle calculator... http://www.1728.org/circsect.htm

...click on pics to enlarge....
post #5 of 6
Thread Starter 
Thank you Dave. I will get to work tonight when i get home. I have not given much thought as to what type or air vents i will use any suggestions.
post #6 of 6
About air vents... what ever you are comfortable with... Spring loaded pie vents, sliding gates.... as long as they are positioned correctly, on the Firebox.... you are good to go...
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